Which dog breed has a flat face and tight curly tail?

Here's why:

* Flat Face: French Bulldogs are known for their distinctive flat faces, also known as brachycephalic.

* Tight Curly Tail: They have a short, tightly curled tail, often described as a "corkscrew" tail.

While there are other breeds with flat faces or curly tails, the combination of both traits is most characteristic of the French Bulldog.